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This set of Operating System (OS) Multiple Choice Questions & Answers (MCQs) focuses on Operating System Set 5

Q1 | Control Unit acts as the central nervous system of the computer.
  • true
  • false
Q2 | What does MBR stand for?
  • main buffer register
  • memory buffer routine
  • main buffer routine
  • memory buffer register
Q3 | In the instruction ADD A, B, the answer gets stored in                        
  • b
  • a
  • buffer
  • c
Q4 | What does PC stand for?
  • program changer
  • program counter
  • performance counter
  • performance changer
Q5 | Which of the following holds the last instruction fetched?
  • pc
  • mar
  • mbr
  • ir
Q6 | The portion of the processor which contains the hardware required to fetch the operations is                
  • datapath
  • processor
  • control
  • output unit
Q7 | Causing the CPU to step through a series of micro operations is called                    
  • execution
  • runtime
  • sequencing
  • pipelining
Q8 | The functions of execution and sequencing are performed by using                              
  • input signals
  • output signals
  • control signals
  • cpu
Q9 | What does D in the D-flip flop stand for?
  • digital
  • direct
  • delay
  • durable
Q10 | What is the high speed memory between the main memory and the CPU called?
  • register memory
  • cache memory
  • storage memory
  • virtual memory
Q11 | Cache Memory is implemented using the DRAM chips.
  • true
  • false
Q12 | Whenever the data is found in the cache memory it is called as                    
  • hit
  • miss
  • found
  • error
Q13 | LRU stands for                        
  • low rate usage
  • least rate usage
  • least recently used
  • low required usage
Q14 | When the data at a location in cache is different from the data located in the main memory, the cache is called                            
  • unique
  • inconsistent
  • variable
  • fault
Q15 | Which of the following is not a write policy to avoid Cache Coherence?
  • write through
  • write within
  • write back
  • buffered write
Q16 | Which of the following is an efficient method of cache updating?
  • snoopy writes
  • write through
  • write within
  • buffered write
Q17 | In                          mapping, the data can be mapped anywhere in the Cache Memory.
  • associative
  • direct
  • set associative
  • indirect
Q18 | The number of sign bits in a 32-bit IEEE format is          
  • 1
  • 11
  • 9
  • 23
Q19 | The transfer between CPU and Cache is
  • block transfer
  • word transfer
  • set transfer
  • associative transfer
Q20 | Computer has a built-in system clock that emits millions of regularly spaced electric pulses per            called clock cycles.
  • second
  • millisecond
  • microsecond
  • minute
Q21 | It takes one clock cycle to perform a basic operation.
  • true
  • false
Q22 | The operation that does not involves clock cycles is                    
  • installation of a device
  • execute
  • fetch
  • decode
Q23 | The number of clock cycles per second is referred as                  
  • clock speed
  • clock frequency
  • clock rate
  • clock timing
Q24 | CISC stands for                          
  • complex information sensed cpu
  • complex instruction set computer
  • complex intelligence sensed cpu
  • complex instruction set cpu
Q25 | Which of the following processor has a fixed length of instructions?
  • cisc
  • risc
  • epic
  • multi-core